Implement DragEvent and move MouseEvent.dataTransfer

Source/web/WebPluginContainerImpl.cpp

Index: Source/web/WebPluginContainerImpl.cpp
diff --git a/Source/web/WebPluginContainerImpl.cpp b/Source/web/WebPluginContainerImpl.cpp
index a45bde39db962415608adcb93c1e4064fcecabb8..36d8bc1f21239d631294b7e8f4e9c992b92338ed 100644
--- a/Source/web/WebPluginContainerImpl.cpp
+++ b/Source/web/WebPluginContainerImpl.cpp
@@ -39,6 +39,7 @@
 #include "core/HTMLNames.h"
 #include "core/clipboard/DataObject.h"
 #include "core/clipboard/DataTransfer.h"
+#include "core/events/DragEvent.h"
 #include "core/events/GestureEvent.h"
 #include "core/events/KeyboardEvent.h"
 #include "core/events/MouseEvent.h"
@@ -200,6 +201,8 @@ void WebPluginContainerImpl::handleEvent(Event* event)
         handleTouchEvent(toTouchEvent(event));
     else if (event->isGestureEvent())
         handleGestureEvent(toGestureEvent(event));
+    else if (event->isDragEvent() && m_webPlugin->canProcessDrag())
+        handleDragEvent(toDragEvent(event));
 
     // FIXME: it would be cleaner if Widget::handleEvent returned true/false and
     // HTMLPluginElement called setDefaultHandled or defaultEventHandler.
@@ -755,12 +758,6 @@ void WebPluginContainerImpl::handleMouseEvent(MouseEvent* event)
 {
     ASSERT(parent()->isFrameView());
 
-    if (event->isDragEvent()) {
-        if (m_webPlugin->canProcessDrag())
-            handleDragEvent(event);
-        return;
-    }
-
     // We cache the parent FrameView here as the plugin widget could be deleted
     // in the call to HandleEvent. See http://b/issue?id=1362948
     FrameView* parentView = toFrameView(parent());